The National Ready Mixed Concrete Association points out that using ashing sumach ash in cement is not a new idea.
国际预拌混凝土协会指,灰烬并不是新的方法。
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They plunged into the narrow path between the tall sumach bushes, and were at once hidden in the gloom.
他们钻进高大的漆树丛之间的狭窄小径,下子就隐没在黑。
Once, and once only, was she completely successful; when she broke down the bough of a large sumach, and by a sudden thought, let her glove fall at the same instant.
次,而且只有次,她完全成功了;当她折断棵大漆树的树枝时,突然想到,让她的手套同时掉了下来。
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